Speaker device for improving mid/high-range frequencies

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure

Reexamination Certificate

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Details

C381S398000, C381S423000, C381S432000, C381S396000, C381S337000, C181S151000, C181S152000, C181S166000, C181S171000

Reexamination Certificate

active

07319772

ABSTRACT:
A speaker device for improving mid/high-range frequencies includes a magnetic base, a frame annularly mounted to the magnetic base, a cone mounted to an inner side of the frame, a voice coil mounted to the cone and suspended in a gap of the magnetic base, and a deadening phase plug mounted on a central portion of the magnetic base. The magnetic base includes a T-iron, a magnet, and a pole plate. The deadening phase plug is made of a sound-absorbing material for absorbing and eliminating sound waves generated by the voice coil and the cone.

REFERENCES:
patent: 3665124 (1972-05-01), Sotome
patent: 5602930 (1997-02-01), Walton
patent: 5739480 (1998-04-01), Lin
patent: 5742696 (1998-04-01), Walton
patent: 6026928 (2000-02-01), Maharaj
patent: 6320970 (2001-11-01), Czerwinski et al.
patent: 6650760 (2003-11-01), Andrews et al.
patent: 7185735 (2007-03-01), Sahyoun
U.S. Appl. No. 10/829,941, filed Apr. 18, 2006.

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